Thiophene-based conducting polymer molecular actuators

被引:23
作者
Anquetil, PA [1 ]
Yu, HH [1 ]
Madden, JD [1 ]
Madden, PG [1 ]
Swager, TM [1 ]
Hunter, IW [1 ]
机构
[1] MIT, Dept Mech Engn, BioInstrumentat Lab, Cambridge, MA 02139 USA
来源
SMART STRUCTURES AND MATERIALS 2002: ELECTROACTIVE POLYMER ACTUATORS AND DEVICES (EAPAD) | 2002年 / 4695卷
关键词
molecular actuator; conducting polymer; thiophene; large strain; molecular design; single molecule; high-throughput synthesis; optical tweezers; AFM;
D O I
10.1117/12.475194
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Traditional conducting polymer actuators such as polypyrrole offer tremendous active stress at low actuation voltages but with moderate strain, strain-rate and efficiency. We report the synthesis of novel thiophene based conducting polymer molecular actuators, exhibiting electrically triggered molecular conformational transitions. In this new class of materials, actuation is the result of conformational rearrangement of the polymer backbone at the molecular level and is not simply due to ion intercalation in the bulk polymer chain upon electrochemical activation. Molecular actuation mechanisms results from pi-pi stacking of thiophene oligomers upon oxidation, producing a reversible molecular displacement which is expected to lead to surprising material properties such as electrically controllable porosity and large strains. The hypothesis of active molecular conformational changes is supported by in situ electrochemical data. Single molecule techniques are considered for molecular actuator characterization. Mechanical properties of these new materials are currently being assessed.
引用
收藏
页码:424 / 434
页数:11
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